Rick says that this motor is nearly twice the weight of the Predator 37 and has a higher rpm.

Postinig in Mar 2007

What an exciting project, thank you for your interest in Hacker Brushless Motors. We absolutely have a system for that plane. Itís going to require an A200 with the Hacker MasterSpin 300. Your going to need to run 14S and a 30X14-32X12 Mejzlik prop.

The only issue at the moment is the MasterSpin 300. Hacker and Jeti are working very hard to finish the production of this esc. and work out some of the small bugs. So at this point they arenít availa bl e. The system (motor and esc) will cost $1649.00 and I hope to have them available for shipping by April.

The following are RC motors that are being considered for a 1/5 scale Electrotor-SloMo:

KV as we use it refers to the rpm constant of a motor - it is the number of revolutions per minute that the motor will turn when 1V (one Volt) is applied with no load attached to the motor. In summary, we call it revs per volt - but do not think you will obtain those revs when you attach a propeller; obviously the revs will be reduced because of the load.

I have seen this aspect of a motor referred to as KV and Kv and kv - just be sure not confuse it with kV which stands for a kilo-volt.

What does the KV tell us? Well it is related to the power out from a motor, or more usefully the torque level of a motor. It is determined by the number of winds on the armature (or turns as we sometimes call it) and the strength of the magnets - you see, there are so many variables with electric motors. So KV allows us to get a handle on the torque we can expect from a particular motor.

In summary, a low KV motor has more winds of thinner wire - it will carry more volts at less amps, produce higher torque and swing a bigger prop.